utilities.
adns is a resolver library for C (and C++) programs, and a collection
- of useful DNS resolver utilities. In contrast with the existing
- interfaces, gethostbyname et al and libresolv, it has the following
- features:
+ of useful DNS resolver utilities.
+
+C library
+
+ In contrast with the standard interfaces, gethostbyname et al and
+ libresolv, it has the following features:
* It is reasonably easy to use for simple programs which just want
to translate names to addresses, look up MX records, etc.
* It can be used in an asynchronous, non-blocking, manner. Many
easily in from the command line and from shell scripts to do
simple lookups. In a more advanced mode it can be used as a
general-purpose DNS helper program for scripting languages which
- can invoke and communicate with subprocesses. See the [1]usage
- message for a summary of its capabilities.
+ can invoke and communicate with subprocesses. See the [1]adnshost
+ usage message for a summary of its capabilities.
-Technical note
+Forthcoming:
- adns requires a real nameserver like [2]BIND or [3]Dents running on
- the same system or a nearby one, which must be willing to provide
- `recursive service'. I.e., adns is a `stub resolver'. All properly
- configured UN*X and GNU systems will already have such nameserver(s);
- they are usually listed in /etc/resolv.conf.
-
+ I hope that future versions may also have the following features:
+ * The library should be useable by threads in a multithreaded
+ program in a natural way. It should multiplex many threads'
+ queries through a single query socket.
+ * IPv6 support.
+ * Some kind of awareness of DNSSEC.
+ * Possibly some very limited caching behaviour.
+ * There was, at one point, a draft native Perl interface from Tony
+ Finch.
+
Documentation
I'm afraid there is no manual yet. However, competent C programmers
- should be able to use the library based on the [4]commented adns.h
+ should be able to use the library based on the [2]commented adns.h
header file, and the usage messages for the programs should be
sufficient.
I have set up mailinglists adns-announce and adns-discuss. The
announcements list is moderated and will contain only announcements of
- important bugs, new versions, &c. The bug reports address mentioned
+ important bugs, new versions, etc. The bug reports address mentioned
above is also a mailing list; feel free to subscribe to it.
- There are [5]archives and subscription web pages, or you can subscribe
+ There are [3]archives and subscription web pages, or you can subscribe
by sending mail containing the word `subscribe' to
adns-announce-REQUEST@chiark.greenend.org.uk or
adns-discuss-REQUEST@chiark.greenend.org.uk.
Download
- Available for download from [6]chiark.greenend.org.uk are:
- * The [7]current beta version as a gzipped tarfile.
- * [8]adns.h API header file with comments (currently there is no
- manual, sorry).
- * All versions released so far are also available via [9]anonymous
- FTP.
- * A mirror of my CVS repository is available via rsync from
+ Available for download from [4]chiark.greenend.org.uk are:
+ * The [5]current release as a gzipped tarfile.
+ * [6]adns.h API header file with comments, and [7]usage message for
+ adnshost (currently there is no manual, sorry).
+ * All versions released so far are also available via [8]anonymous
+ FTP and [9]HTTP.
+
+ You can also access the project CVS repositories:
+ * A mirror of the source code repository is available via rsync from
rsync.chiark.greenend.org.uk::ftp/users/ian/cvs-pub/adns (use FTP
first to find your way around), or via [10]cvsweb.
+ * This web page is maintained in [11]Savannah, where you can browse
+ the [12]webpage CVS.
- adns is also available from the [11]GNU Project FTP servers and their
- [12]mirrors.
+ adns is also available from the [13]GNU Project FTP servers and their
+ [14]mirrors.
+Technical note
+
+ adns requires a real nameserver like [15]BIND or [16]Dents running on
+ the same system or a nearby one, which must be willing to provide
+ `recursive service'. I.e., adns is a `stub resolver'. All properly
+ configured UN*X and GNU systems will already have such nameserver(s);
+ they are usually listed in /etc/resolv.conf.
+
+References and related projects
+
+ * [17]Python bindings by Andy Dustman.
+ * [18]Haskell bindings by Peter Simons.
+ * [19]liboop event loop library (by Dan Egnor) has a built-in
+ binding for adns.
+ * [20]port to MS Visual Studio 6 C++ by Jarle Aase.
+
Copyright and licensing
- adns is Copyright 1997-2000 Ian Jackson, Copyright 1999 Tony Finch,
- and Copyright (C) 1991 Massachusetts Institute of Technology.
+ adns is Copyright 1997-2000,2003,2006 Ian Jackson, Copyright
+ 1999-2000,2003,2006 Tony Finch, and Copyright (C) 1991 Massachusetts
+ Institute of Technology.
adns is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
This program and documentation is distributed in the hope that it will
be useful, but without any warranty; without even the implied warranty
of merchantability or fitness for a particular purpose. See the
- [13]GNU General Public License for more details.
+ [21]GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with adns, or one should be available above; if not, write to
- the [14]Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+ the [22]Free Software Foundation, 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA, or email adns-maint@chiark.greenend.org.uk.
_________________________________________________________________
- [15]Ian Jackson / [16]adns-maint@chiark.greenend.org.uk; more [17]free
+ [23]Ian Jackson / [24]adns-maint@chiark.greenend.org.uk; more [25]free
software by me.
- [18]GNU home page; [19]chiark home page; [20]site or mirror home page
+ [26]GNU home page; [27]chiark home page; [28]site or mirror home page
- This web page is Copyright (C)1996-2000 Ian Jackson. See the
- [21]Copyright/acknowledgements.
+ This web page is Copyright (C)1996-2005 Ian Jackson. See the
+ [29]Copyright/acknowledgements.
- Use any browser - [22]Campaign for a non-browser-specific WWW
+ Use any browser - [30]Campaign for a non-browser-specific WWW
References
- 1. http://www.chiark.greenend.org.uk/~ian/adns/usage/adnsresfilter_usage.text
- 2. http://www.isc.org/view.cgi?/products/BIND/index.phtml
- 3. http://www.dents.org/
- 4. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt
- 5. http://www.chiark.greenend.org.uk/mailman/listinfo
- 6. http://www.chiark.greenend.org.uk/~ian/adns/
- 7. http://www.chiark.greenend.org.uk/~ian/adns/adns.tar.gz
- 8. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt
- 9. ftp://ftp.chiark.greenend.org.uk/users/ian/adns/
+ 1. http://www.chiark.greenend.org.uk/~ian/adns/adnshost.txt
+ 2. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt
+ 3. http://www.chiark.greenend.org.uk/mailman/listinfo
+ 4. http://www.chiark.greenend.org.uk/~ian/adns/
+ 5. http://www.chiark.greenend.org.uk/~ian/adns/adns.tar.gz
+ 6. http://www.chiark.greenend.org.uk/~ian/adns/adns.h.txt
+ 7. http://www.chiark.greenend.org.uk/~ian/adns/adnshost.txt
+ 8. ftp://ftp.chiark.greenend.org.uk/users/ian/adns/
+ 9. http://www.chiark.greenend.org.uk/~ian/adns/ftp/
10. http://www.chiark.greenend.org.uk/ucgi/~ijackson/cvsweb/adns/
- 11. http://www.gnu.org/
- 12. http://www.gnu.org/order/ftp.html
- 13. http://www.chiark.greenend.org.uk/~ian/COPYING.txt
- 14. http://www.fsf.org/
- 15. http://www.chiark.greenend.org.uk/
- 16. mailto:adns-maint@chiark.greenend.org.uk
- 17. http://www.chiark.greenend.org.uk/~ian/software/
- 18. http://www.gnu.org/
- 19. http://www.chiark.greenend.org.uk/
- 20. file://localhost/
- 21. http://www.chiark.greenend.org.uk/~ian/sw-www-copy.html
- 22. http://www.anybrowser.org/campaign/
+ 11. http://savannah.gnu.org/
+ 12. http://savannah.gnu.org/cgi-bin/viewcvs/software/adns/?cvsroot=www.gnu.org
+ 13. http://www.gnu.org/
+ 14. http://www.gnu.org/order/ftp.html
+ 15. http://www.isc.org/view.cgi?/products/BIND/index.phtml
+ 16. http://www.dents.org/
+ 17. http://dustman.net/andy/python/adns-python
+ 18. http://cryp.to/hsdns/
+ 19. http://liboop.ofb.net/ref
+ 20. http://adns.jgaa.com/
+ 21. http://www.chiark.greenend.org.uk/~ian/COPYING.txt
+ 22. http://www.fsf.org/
+ 23. http://www.chiark.greenend.org.uk/
+ 24. mailto:adns-maint@chiark.greenend.org.uk
+ 25. http://www.chiark.greenend.org.uk/~ian/software/
+ 26. http://www.gnu.org/
+ 27. http://www.chiark.greenend.org.uk/
+ 28. file://localhost/
+ 29. http://www.chiark.greenend.org.uk/~ian/sw-www-copy.html
+ 30. http://www.anybrowser.org/campaign/